Why are some images missing?

Only supported HTML image attributes are inspected. CSS backgrounds, JavaScript-only galleries and images loaded after interactions may be absent. The tool does not render the website or validate image downloads. Review the image sitemap against the source site. Pages without extracted images are not listed in image mode.

Image mode does not use page screenshots. Check the actual HTML attributes for a missing image, and remember that a page containing no supported image attributes will not produce an image-mode entry.